This report provides a detailed analysis of management accounting principles and systems, with a specific focus on their application within Tesco Ltd. It begins by defining management accounting and its role in decision-making, followed by an examination of key principles such as designing and compiling, management by exception, and control at source accounting. The report then delves into various management accounting systems, including cost accounting, inventory management, and price optimization, along with their respective methods like job order costing, process costing, LIFO, and FIFO. Furthermore, it presents techniques and methods used in management accounting, such as income statements, balance sheets, and ratio analysis, alongside an integration of management accounting systems and reporting within an organization. Finally, the report concludes by outlining the benefits of an effective management accounting function, emphasizing its importance in forecasting, planning, organizing, controlling performance, coordinating, and communication within the company.